The ecclesiastical architecture of Ireland, anterior to the Anglo-Norman invasion; comprising an essay on the origin and uses of the round towers of Ireland, which obtained the gold medal and prize of the Royal Irish Academy (1845)
Petrie, George, 1789-1866 · Dublin : Hodges and Smith · leaf 206
. I may ob-serve also, that the horizontal-headed-window and the triangular-headed one, are usually fovmd inthe south wall of the chancel, andvery rarely in the east wall, whichusually contains a semicircular-headed window, the arch of whichis often cut out of a single stone,as in the annexed…
Church architecture · Round towers
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